One of my friend has 2007 City iDSI (bought a couple of months back). Current mileage on meter is around 120K.
He went to Honda 3S and get the engine full checkup and tuning, tappet, throttle, fuel injector, etc. The mechanic said that Cylinder 2 is getting week and Plugs at number 2 have some oil in it. Rest of the plus were ok, he said that engine is week and might need overhaul he suggested to get the oil change after every 2500km.
Engine still throws some water from exhaust, so does that mean it still can give him some mileage?
What should he (my friend) so to maintain this week engine till max. life.